Among many other duties and responsibilities, I am also a Domain Admin of my company's Active Directory. Despite having a normal user account, I must confess to frequently logging into my desktop with my Domain Admin account. On one such occasion, I was trying to track down a DNS issue that our Sydney office was suffering, when I realised that I needed to flush my local DNS resolver cache. Pretty straight forward? Just open a Command Prompt:
C:\>"ipconfig /flushdns"
The requested operation requires elevation
C:\>
Oh! That didn't work! What the heck is "elevation"? Other than sounding like a U2 song!
Well, having googled around and found
this thread on a Microsoft site, it appears that as an Active Directory Domain Admin I was insufficiently priviledged on my Desktop to perform that operation from a Command Prompt!
To be able to perform that sort of operation in a Command Prompt I should have started the Command Prompt with "Run as Administrator".

Some may argue that this is merely improving security, but I would not be one of them. Since then, I was started up FileZilla which informed me there was an update available and did I want to install it. I said yes. FileZilla downloaded the file successfully, and then failed. Guess what! Actually running the install program was an operation which required elevation. Grrr!